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Colpitts oscillator

An oscillator and start-up guidance technology, applied in power oscillators, electrical components, etc., can solve problems such as the inability to meet the requirements of brain implanted sensors and large input voltage

Active Publication Date: 2015-12-30
ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, since resonance requires a transistor voltage gain of at least 4, in order to start and maintain oscillation sm

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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] In ultra-low voltage microelectronics, the sub-threshold principle of the near-zero threshold MOS tube is: the ultra-low supply voltage is on the order of hundreds of millivolts, and the width-to-length ratio of the tube is on the order of 1000. At this time, due to the drain The current is a grid voltage power law about the e index, which is non-linear, and it is convenient to obtain a large voltage gain. Therefore, in the design of the new circuit top...

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Abstract

The invention discloses a Colpitts oscillator. The Colpitts oscillator depends on a near-zero threshold value MOS tube during oscillation starting and is designed by applying a substrate bias method or a grid bias method respectively, it is ensured that the MOS tube voltage gain required by circuit resonance is far greater than 4 according to the index response characteristic of the common-gate amplification coefficient of the near-zero threshold value MOS tube, and accordingly the Colpitts oscillator can achieve oscillation starting and oscillation maintenance under the condition of ultralow direct current input voltage and meet the requirements of a brain implant sensor.

Description

technical field [0001] The present application relates to the field of electronic circuit design, and more specifically, to a Colpitts oscillator. Background technique [0002] In recent years, with the urgent need for miniature smart terminals, ultra-low voltage microelectronics has become popular. Colpitts oscillator is a typical module in electronic circuits. The classic topology of its oscillation circuit is driven and maintained by a single transistor (essentially negative resistance), which constitutes the outstanding advantage of its simple structure. [0003] However, since resonance requires a transistor voltage gain of at least 4, in order to start and maintain oscillation smoothly, the existing Colpits oscillator has a large input voltage, which cannot meet the requirements of brain implant sensors. Contents of the invention [0004] In view of this, the present application provides a Colpitts oscillator to reduce the input voltage and meet the requirements of ...

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Application Information

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IPC IPC(8): H03B5/04H03B5/06
Inventor 李文石肖鹏黄于城宋佳佳
Owner ZHANGJIAGANG INST OF IND TECH SOOCHOW UNIV
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